US984204A - Lock-out for party-line-telephone subscribers' stations. - Google Patents

Description

J. ERIGKSON. I LOOK-OUT FOB IPARTY LINE TELEPHONE SUBSGEIBERS STATIONS.

I 7 APPLICATION FILED IB. 16, 1906. 984,204.

Zaz Znww m @WM Md h 5 ms &/

UNITED STATES pg rnnr OFFICE.

JOHN ERICKSON, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 FIRST TRUST AND SAVINGS BANK, TRUSTEE, OF CHICAGO, ILLINOIS.

LOCK-OUT FOR IPARTY-LINE-TELEPHONE SUBSCB-IBERS STATIONS.

Specification of Letters Patent.

Application filed April 16, 1906. Serial No. 311,871.

To all whom 'it may concern:

Be it known that I, JOHN Enronson, a

citizen of the United States of America, and

with those of the called subscribers, and cspecially to automatic telephone systems in which several subscribers stations are located on a single line, and in which each sub scriber is equipped with means for transmitting the electrical impulses necessary for opcrating the automatic exchange or' switching machinery by which any calling subscriber obtains connection with, the substation of any called subscriber, even though the calling and called subscribers are both located on the same line.

generally stated, the object of my invention is the provision of improved means for preventing one subscriber from disturbing or interfering with the connectionsestablished by another subscriber already in pos session of the same line.

Special objects pf my invention are the provision of an improved construction and. arrangement whereby certain circuits .are controlled by the cotiperation of an e1ectromagnet and the usual switch-hook or lever for supporting the telephone receiver; provision of an improved construction and arrangement whereby a spring switch is notv operated by the upward movement of the switch-hook except when the associated electromagnet is energized; and the provision of certain details, features. of improvement and combinations tending to increase the genera]. efficiency and "certainty of action of a device of this particular character To the foregoing and other useful ends,

7 my invention consists in matters hereinafter set forth and claimed; v

In the accompanying drawings, Figure 1 is a side elevation of a subscribers h0okswitch and associated parts, showing a lockout embodying the principles of my invention, the switch'hookbeing'down. Fig. 2 is a detail showing the conditlonof the lock the out when the switch-hook is up and the associated electromagnet not energized. Fig.3 1s a v1ew s1m1lar to Fig. 1, but showing the electroanagnet energized and switch hook up. Fig. 4' is a perspective of the engaging portions of the armature and the springs and the link carried'by the switch-hook.

For the broader purposes of my invention the subscribers switch mechanism A can-be of any suitable,known or approved character. Preferably, however, it involves an up and down swinging switch-hook 13 adapted to control the circuits of the substation in any suitable or, desired manner. This switchhook or receiver-arm is provided with a depending link or arm C adapted to cooperate with the look-out magnet D in controlling the circuit switch-springs E. For this purpose the said link or arm G is provided with an outer cam ortion o, a lower vertical and longitudinal s at 0 an inner shoulder 0 and an inner cam portion 0. It will be observed that the cut out magnet D is suitably supported by a framed, and provided with a pivoted armature d, This armature has Patented Feb. 14, 1911.

its upper end provided with a lug or finger (Z adapted to engage and work up and down. in the slot. c --that is to 'say, the link or arm O moves up and down and thereby causes the relative movement between the said finger and slot. A spring d? issecured to the frame d of thesaiol magnet, and is provided at its upper end with. a portion (1 adapted normallyto engage the depression or notch immediately above the cam'portionc, as shown in Fig. 1. Another spring (Z -has its lower end secured to the frame of said magnet, and its upper end provided with a shoulder (Z The upper end of the said spring (i may normally bear against the cam portion 0, as shown in Fig. l. The

upper spring 6 has its end portionprovided with a longitudinally extending slot 6 in which the lower end portion of the link or arm C works or moves up and down. It will also be seen that the upper spring 6 has an end portion 6 adapted, under certain conditions, to be engaged and held up by the shoulder d The'mode of operation is as follows: In normal condition the parts are in the position shown in Fig. 1. When theswitclihook rise s,-and if the-electrdmagnet'D is not energized, the parts assume the positions shown in F1g. 2. Under such "conditious,

it will be seen that the switch-springs E remain closed, inasmuch as the shoulder a was held out of engagement with the spring I e, by the pressure of the "spring (l -At this time, the flat inner face of the shoulder (i bears against the end portion 6 of the spring and thus holds the switch-springs E in a 'closed condition. Suppose, however, that the magnet D were energized when the switch-hook rises. In such case, the armatime d would cause its finger d to pull the link'or arm C inwardly, thus causing the shoulder a" to .engage the spring 0 at the inner end ofthe slote the attractive force of said magnet being sufficient to overcome the pressure of the spring i This lifts the spring 6 into the position'shown in Fig. 3, causing the springs E to separate, thus opening the circuits controlled thereby. In Fig.

3, when the switch-hook moves down, the movement permits the upper spring 6 to engage the shoulder d, and as soon as the cam portion 0 engages the upper spring d, the spring 6 is thereby released from the shoulder (F, E thus permitted to close together. in this way, it will be seen that the electro-magnet and the switch-hook cooperate in controlling the switch-springs E. If the electro-magnet is energized, the raising of the switch-hook will inevitably open the said switch-springs. However, if the conditions are such that the said. elect'ro-magnet does not energize, then the circuits controlled by the said switch-' springs-remain closed, as the raising of the switch-hook does not disturb them.

controlled thereby can be of any For the broader purposes of my invention, the said switclrsprings and the circuits suitable or desired character; Preferably, however, my

' improved device is employed as a lock-out forparty-llnes, and s in the nature of an improvement on the construction and arrangeare removable as a unit.

ment. I do not, therefore, limit myself to the'exact details shown and described.

The energizing circuit of the magnet D it will be understood,- be controlled by can the sw:itcli-hookitself, or by any other suitable means. Preferably, also, shown, the electro-magnet D and the switch-springs E In fact, the entire lock-out device is, with the exception of the link or arm G, removable as a unit.

It will be seen that the link or arm C is employed for directly operating the switch spring a conan operating member through the adapted to open and close the said switch or switch-springs'. It will also be seen that the I armature (Z normally engages the core or pole-piece of the electro-magnet, thus requiripg but little current to operatively ener-' gize the electro-magnet. If. the electro-magnet is energized, the parts simply remain in end of the.

a hd the lower springs the posit-ion shown in Fig. 3, the tension of the spring (l armature away from the said core or polepiece of the electro-magnet. Consequently, as explained, the armature remains in its normal position, and the switch or switchsprings E are opened by the upward movement of the switch-hook. Also, as previously explained, the switch-springs do not close together until the cam portion 0 engages the upper end of the spring dfi, and

thereby draws the shoulder d out of engagement with the'e'nd e of the spring 6. condition of the electro-magnet causes the operation. of the switch or switch-springs. and the opposite electrical condition of said electro-magnet prevents the operation of the. said switch or switclrsprings. Preferably, however, the saidarmature of the electromagnet is normally retained in its attracted position.

The paramagnetic member d" normally being incapable of pulling the One I closes the magnetic circuit of the electromagnet D.

. The link C can, of course, be supported upon the switch-hook in any suitable manner consistent with the desired mode of operation and results. For example, it can have its upper end pivotedupon the switch'hook, whereby its lowerend may swing without causing any movement of the switch-hook. It will be understood, however, that I do not limit myself to this particular construction.

What I claim as my invention s 1. In a device of the class specified, the combination of circuit-controlling switchsprings, a subscribers switch-hook provided with means for directly operating said. switch-springs, and an electro-ina'gnet providedwith an armature engaging said means to cooperate with said switch-hook in controlling said switch-springs, having provisions whereby said springs are not operable by the switch-hook except when the said magnet is energized.

2. In a device of the class specified, the combination of switch-springs, a subscribers switch-hook, a link or arm depending from said switchhook, adapted to directly operate said switch-springs, and an electromagnet provided with an armature adapted to engage and cooperate with said link or arm in controlling said switch-springs.

3. In a device of the class specified, the combination of normally closed switchsprings, a subscribers switchhook, a connection carried by said '--switch-hoolr and' 4.. In a device of the class specified, thecombination of switeh-springs,asubseribers switch-hook, a link or arm depending from said switclnhook, provided with a slot and a shoulder and a couple of cam portions, a member for operating said switch-springs, provided with a slot in which the said link or arm moves up and down, a spring adapted to engage one of said cam portions, provided with a shoulder for engaging and upholding the end of said member, a spring for engaging the other cam portion, adapted to hold'said shoulder on the link out of engagement with said member, an electro-magnet, andan armature for said'magnet, provided with a finger-adapted to engage said slot in said link, said armatm'e when at" tract'ed causing said shoulder on the link to engage and lift said member, whereby the upward movement ofsaid switch-hook does not disturb or operate the switch-springs exceptwhen said magnet is energized.

In a device of the class specified, the combination of a circuit-controlling switch, a switch-hook, an electro-magn'et, means by which the switch-hook directly operates the said switch, and means by which the energization of the magnet enables the switchhook in rising to open said switch.

(3. In a device of the class specified, the combination of a switch, a subscribers switch-hook, a direct connection between the switclrhook. and the switch,- adapting the former in rising to operate the latter,'an electro-m'agnet, means by which one condi tion of said magnet permits the opening of said switch, and means by which the opposite electrical condition of said magnet pre-' vents the opening of said switch.

7. In a device ofthe class specified; the combination of switch-springs,asubscribers switch-hook provided with means for di rectly operating said switch-springs, and an I electro-magnet provided with an armature adapted to cooperate with said means in controlling said switch-springs, together with means by which the electro-Jnagnet and switch-springs are removable as a unit.

8. In a device of the class specified, the con'ibiimtion of switch-springs,asubscribers switch-hook. a link or arm depending from said switclrhook, adapted to directly operate said switch-springs, and an electiomagnetprovided with an'armature adapted to engage and cooperate with said link or arm in controlling said switch-springs, together with means by which the electro-inagnet and switch-springs are removal'ile as a unit.

9. In-a device of the class specified. the

combination of normally. closed. switch springs,-a subscribers .switch hook. a connection carried by said switch-hook and adapted to operate said switch-springs, an electroonagnetprovided with ,an armature adapted to engage said connection, and S grings engaging said connection, whereby t e switch-s n'ings remainclo'sed when the switch-hook is up if the magnet is not. energized, together with means by which the electro-n-nignet and switch-springs are remoyable as a unit.

10. In a device of the class specified, the combination of switch-springs, a subscribefs switch-hook, a link or arm depending from said switch-hook, provided with a slot and a shoulder and a couple of cam portions, a member for operating said switch-springs, provided with a slot in which the said link or arm moves up and down, a spring adapted to engage one of said cam portions, provided with a shoulder for engaging and upholding the end of said member, a spring for engag ing the other cam portion, adapted to hold said shoulder on the link out of engagementwith said member, an electro-i'nagnet, and

an armature for said magnet, provided with a. finger adapted to engage said slot in said link, said armature when attracted causing saidshoulder on the link to engage-and litt said member, whereby the upward mov ment of said switch-hook does not disturb or operate the switch-springs except when said magnet" is energized, together with means by which the electro-magnetand switch'springs are removable as a unit.

11. in a device of the class specified, the combination of a circuit-controlling switch, a switch-hook, an electro-magnet, means by which the switch-hook directly o -crates the said switch. and means by which the energization of the magnet enables the switchhook LO operate said switch,- together with means by which the clectro-magnet and switch-are removable as a unit.

12. In a device of the class specified, the combination of a switch, a sub: ribers switch-hook, a direct connection between the switch-hook and the switch, adapting the former to operate the latter, an electro-magnetmeans by which one condition of said n'iagnet permits the operation of said switch, and means by which the opposite electrical condition of said magnet prevents the operation of said switch. together with means by which the electro'm'agnet and switch are removable as a unit; 7

15 In a device of the class specified, the combinationof switch-s irings, a subscribers switch-hook provided w'ithmeans for directly operating said switch-springs. and an electro-magnet provided with' an ari'nature adapted to cooperate with said means in contmlling said switch-springs, the armature of said magnet normally engaging the core or polc-piece of said magnet, having provisions whereby said springs are not operable by the switch-hook except when the said magnet s energized.

14. T11 a device of the class specified; the conibination of switch-springs, a snbscr'ibcfis switch-hook; a link or arm depending from said switch-hook, adapted to directly operate said switch-springs, and an electro-magnot provided with an armature adaptedio engage and coiiperatewith said link or arm in controlling said switch-springs, the armature of said magnet normally. engaging the core or pole-piece of said magnet.

15. In a device of the class specified, the combination of normally closed switchsprings, a subscribers switch-hook, a connec tion carried by said switch-hook and adapted to operate said switch-springs, an electro magnet provided with-an armature adapted. to engage sald connection, and springs engaging said connection, whereby the switchsprings remain closed when the switch hook is up if the magnet is not energized, the ariature of said magnet normally engaging the core 'or pole-piece of said magnet.

16. In a device of the class specified, the combination of switch-springs, a subscribers switch-hook, a link or arin depending from said switch-hook, provided with a slot and a shoulder and a couple of cam portions, a member for, operating said switch-springs, provided with a slot in which the said link or armmoves up and down, a spring adapted to engage one of-said cam portions,"provided with a shoulder for engaging and upholding the end of said member, a spring for engaging the other cam portion, adapted to hold'said shbulder on the link out of engagement with said member, an electro-mag- 4 net, and an armature for said magnet, pronot disturb or operate the switch-springs except when said magnet is energized, the armature of said magnet normally engagiug the core-or pole' piece of said magnet.

17. In a device'of the class specified, thecombination of a circuit-controlling switch,

aswitch-hook, an e'lectro-magnet,f 1neans by.

which the switch-hook directlyoperates the Ftlld-SWliCl],H-11(1-mBt-IlS by which the ene1fgization of the magnet enables the switchhook to operate said switch, the armatureof said magnet normally engaging the core or pole-piece of said magnet.

18;- In a device of the class specifiechthe combination of" a switch, a- 'subscribers -switcl1-hook,,a direct connection in the fo'rm of :1 depending. link between the switchhook and the switch, adapting the former to operate the latter, an electro-magnet,-means by which one condition of said magnet. causes the operation of said switch. and means by which the opposlte electrical con-' dition ofsaidinagnet prevents the opera: tion' of-sa id switch, the armature of'said magnet normally engaging the core or pole mnt by which the switchhook directly opcrates the said switch, and means engaging piece of said magnet. r

,19. In a device of the class specified, the

combination of switch-springs, a subscribers --s\\'itcl1-l1ook provided with means for dirm-tly operating said switch-springs, and n': clcctro-magnetprovided with an armature adapted to cooperate with said means in from said switch-hook, adapted to directly operate said switch-springs, and an electromagnet provided with-an armature adapted to engage and-cooperate with said link or arm in controlling said switchsprings, together with paramagnetic means for nor mally closing the magnetic circuit of said magnet. v

21. In a device of the class specified, the combination of normally closed switchsprings, a subscribers switch-hook, a connection carried by said switch-hook and adapted to operate said switch-springs, an electro-magnetprov1ded with an armature adapted to engage said connection, and

springs engaging said connection, whereby the switch-springs rema n closed when the switch hook is up if't-he magnet, 1s not en-.

e'rgized, together with paramagnetic means .for normally closing the magnetic circuit of said magnet.

'22. In a device ofthe class specified, the combination of switch-springs, a subscribers switch-hook, a link or arm depending from said "switch-hook, provided with a slot and a shoulder and a coupleof cam portions, a member for operating saidswitch-springs, provided with a slot: in which the said link or arm moves up and down, a spring adapted to engage one of said cam portions, provided with a shoulder for engaging and upholding the end of said'm'eniber, a spring for engaging the other cam portion, adapted to hold said shoulder on the link out of en gagement wit-h said member, an electro-niagnet, and an armature for said magnet, pro

vided with afinger adapted to engage said slot in said link, said armature when attracted causing said shoulder on the link to engage and lift said member, whereby the upward movement of said switch-hook does not disturbor operate.theswitch springs except when said magnetis energized, together with paramagnetic means for normally cl0s ing the magnetic circuit of said magnet. i v 23. In a device of the class specified, the combination of a circuit controlling switch, a switch-hook, an electr c-magnet, an ele the magnetic circuit said element by which the coor ination pt the magnet enables the srntclrliool; to open ate 0 switch, normally closing the magnetic ('ll'tltlt of Fttltl magnet.

Bl. In a device of the (fill-if, spr-cihcil, the

combination 0t a switch, a suhscrilair's switch-hook, a direct (:UlllK-FCfi'lOll between the switch mi; and the switch. adaptnur the J? i i i ioriner to operate the lflll'clan elcctro-magnet, means engaging said. connection by whiclrone condition oi said iagnet permits the operat on of said switch, and means by which the opposite electrical condition of said magnet prevents the operation of said switch, including paramagnetic means "for normally closing the magnetic circuitot' said magnet.

25. In a electro magnet normally dee-nergized and provided with an armature normally held in its attracted position, controlled by said. armature, operative only when the magnet is energized.

36. In a device of the class specified, the combination ot switch-springs, a sub-"crib ers switch-hook provided with means for directly operating said switch-springs, and a normally vdeli:lergized clectronnagnet provided with an armature adapted to cooperate with said means in controlling said switch-springs. having provisions pei ting the switclrhook, to rise without operat ing said springs, together with paramag' netic means for normally closing the magnetic circuit of said magnet by the normal engagement of the armature and core. thereof. 27.111 a device of theclass specified, the combination of switch-springs, a subscribers switch-hook, a link or arm depend ing from said switclrhook, adapted to directly operate said switclrsprings, and a normally .deenergized electroniagnet provided with an armature adapter, to engage and cot-iperate with said link or arm in controlling said switch-springs, together with paramagnetic means for normzilly closing of said magnet by the normal engagement of the armature and core thereof. i 4 a 2%. in a device of the class specified, the combination of normally closed switchsprings, a subscribers switch-hook, a connection; carried by said switch-hook and adapted-to operate said switch-springs, a normally dcenergized electromagnet provided with an armature adapted to engage said connection, and springs engaging, -;said connection, whereby the switch-springs re main closed when the switch hook is up if the magnet is not energized, together with paramagnetic means for normally closing the: magi'ietic circuit. ofsai d magnet.

29. In a device'of the class specified, the

device of the class specified, an

and switch-springs ing .-omhimition of switch-springs, a sabscribers SXllt'lldlOOli. a link or arm depending from said switch-hulk, provided with a slot and a shoulder and a couple of cam portions, a member for operating said sw tch-springs,

provided with a slot in which the said link or arm moves up and down. a spring adaptcd to engage one of said cam portio s. provided with a sln'iuldcr for engaging and upholding: the end of said mcmbel, a spring for engaging the other cam portion, adapted to hold said shoulder on the link out of engagement with saidmcrhbcr, a normally deenergized electromagnet, and an armature for said magnet, provided with a linger adapted to engage said slot, said armature when attracted causing said shoulder on the link to engage and liftsaid member, whereby the upward movement of said switchhook does not disturb or operate the switchsprings except when said magnet is energized, together with paramagnetic means for normally closing the magnetic circuit of said magnet.

v 30. In a device of the class specified, the combination of a circuit-controlling switch, a switch-hook, a normally denergized 'electromagnet, means by which the switclrhook directly operates the said switch, and means by which the energization of the magnetenahles the switch-hook to operate said switch, together with paramagnetic means for normally closing the magneticcircuit of said magnet by the normal engagement of the ar mature and core thereof.

31. In a. device of the class specified, the combination of a switch, a snbscribers switch-hook, a direct connection between the switch-hook and the switch, adapting the former to operate the latter, a normally do.- energized electromagnet, means by which one condition of said magnet causes the op eration of said switch, and means by which the opposite electrical condition of said magnet prerents the operation of said switch, when the switch-hook rises, together with paramagnetic means for normally closing the magnetic circuit of said magnet by the normal engagement of the armature and core thereof.

32. In a telephone system, a switclrhook, a link carried thereby, a spring switch, an electromagn'et provided with means for holdthe link in position to open the said spring switcln-andImeans for holding the said switch open while the switch-hook moves down.

33. In a telephone system, a switch-hook, a link carried thereby, a normally closed switch, an 'electromagnet provided with means for holding said'link in position to open said normally closed switch when the' switch-hook moves up, means for holding the said switch open while the switch-hook moves down, and means on said link for efthe other side of said link, an electromagnet fecting the closure of said switch. provided with an armature having a spring 1.5 34. In a telephone system, a switch-hook, contact engaging said first-mentioned cam, a normally closed switch, an electromagnet another spring cooperating with the see'ond 5 p ovided With an armature, a link carried cam to change the position of the link, and by the switch-hook and engaging said nr- 21 spring switch adapted to he opened by said mature, and spring means whereby the nrshoulder if the magnet is energized.

mature, when the magnet is energized, holds Signed by me at Chicago, Cook county, the link in position to open said switch when Illinois, this 12th day of April, 1906. 10- the sivitchhook moves up. JOHN ERICKSON.

' 35. In a telephone system, a switclrlioolt, Witnesses:

a link depending therefrom, a cam on one EDWARD D. FALES,

side of said link, a cam and a shoulder on B. D. lVILLiS.

Images